Bringing back eo symbols for xkb

I port the patch for esperanto symbols removed in
1be2acd131 to the current
xkeyboardconfig.

(cherry picked from commit 4a830de0323e34592a36dea660d9a3ec8348964e)

pkgs/servers/x11/xorg/overrides.nix

@@ -264,7 +264,8 @@ in
 
     buildInputs = attrs.buildInputs ++ [args.intltool];
 
-    #TODO: resurrect patches for US_intl or Esperanto?
+    #TODO: resurrect patches for US_intl?
+    patches = [ ./xkeyboard-config-eo.patch ];
 
     # 1: compatibility for X11/xkb location
     # 2: I think pkgconfig/ is supposed to be in /lib/

pkgs/servers/x11/xorg/xkeyboard-config-eo.patch

@@ -0,0 +1,71 @@
+diff --git a/rules/base.xml.in b/rules/base.xml.in
+index ec321f8..e9c3546 100644
+--- a/rules/base.xml.in
++++ b/rules/base.xml.in
+@@ -1786,6 +1786,13 @@
+     </layout>
+     <layout>
+       <configItem>
++        <name>eo</name>
++        <_shortDescription>Esp</_shortDescription>
++        <_description>Esperanto</_description>
++      </configItem>
++    </layout>
++    <layout>
++      <configItem>
+         <name>ir</name>
+         <_shortDescription>Irn</_shortDescription>
+         <_description>Iran</_description>
+diff --git a/symbols/Makefile.am b/symbols/Makefile.am
+index 97c816d..d7e3a4e 100644
+--- a/symbols/Makefile.am
++++ b/symbols/Makefile.am
+@@ -10,7 +10,7 @@ bt by braille \
+ ca cd \
+ ch cn cz \
+ de dk \
+-ee es et epo eu \
++ee eo es et epo eu \
+ fi fo fr \
+ gb ge gh gn \
+ gr hr hu \
+diff --git a/symbols/Makefile.in b/symbols/Makefile.in
+index b5be077..5cddcc7 100644
+--- a/symbols/Makefile.in
++++ b/symbols/Makefile.in
+@@ -222,7 +222,7 @@ bt by braille \
+ ca cd \
+ ch cn cz \
+ de dk \
+-ee es et epo eu \
++ee eo es et epo eu \
+ fi fo fr \
+ gb ge gh gn \
+ gr hr hu \
+diff --git a/symbols/eo b/symbols/eo
+new file mode 100644
+index 0000000..d6358c9
+--- /dev/null
++++ b/symbols/eo
+@@ -0,0 +1,21 @@
++// $XFree86$
++
++partial alphanumeric_keys
++xkb_symbols "basic" {
++
++     // Describes the differences between a very simple en_US
++     // keyboard and a simple Esperanto keyboard
++     // Press AltGr or Windows Menu key together with C, H, J, S, U
++     // to get accented letters.
++     // 2001 by Radovan Garabik <garabik@melkor.dnp.fmph.uniba.sk>
++
++    key.type = "FOUR_LEVEL";
++
++    key <AD02>  { [w,W, ubreve,Ubreve ] };
++    key <AD07>  { [u,U, ubreve, Ubreve ] };
++    key <AC02>  { [s,S, scircumflex,    Scircumflex ] };
++    key <AC05>  { [g,G, gcircumflex,Gcircumflex ] };
++    key <AC06>  { [h,H, hcircumflex,Hcircumflex ] };
++    key <AC07>  { [j,J, jcircumflex,Jcircumflex ] };
++    key <AB03>  { [c,C, ccircumflex,Ccircumflex ] };
++};